Receiving, Handling And Storing; Inspection; Storing - Westinghouse DB-15 Instructions Manual

PART ONE

RECEIVING, HANDLING AND STORING

Type "DB" air circuit breakers, with all attach­
ments mounted in place, are shipped in wooden
crates or cardboard containers.
Important:
To avoid damage to the break­
ers, do not use hooks in handling.
Net weights of Types DB-15 and DB-25 are given
in Table No. 1 below.
I.
Table No. NET WEIGHTS
DB-15
TYPE
--- --- -- ----- ------ ---- ----
2-Pole
Manual 60 lbs.
Electric 75 lbs.
Immediately upon receipt, examine the shipment
for any loss or damage incurred during transit. If
injury or rough handling is evident, file a damage
claim at once with the transportation company and
notify the nearest Westinghouse Sales Office.
When unpacking, be sure that no loose parts are
missing or left in the packing material. Report all
shortages at once. Blow out any dust or particles
of packing material that may have accumulated on
the circuit breaker parts.

INSPECTION

The "DB" breaker assembly consists of a coor­
dinated group of sub-assemblies mounted on a steel
supporting panel. {See Fig. 1). The complete break­
er assembly is to be mounted with the steel panel
in a vertical position. All inspections for proper
operation should, therefore, be made with the break­
er in this position. Final inspection should prefer­
ably be made with the breaker in its permanent
mounting.
Inspect the breaker as follows:
1.
Raise and lower the trip bar by hand to make
sure that it does not bind.
Z.
Rotate the manual operating handle slowly in
a clockwise direction to move the contacts toward
the closed position.
DB-25
3·Pole 2·Pole 3-Pole
70 lbs. 80 lbs. 90 lbs.
85lbs. 100 lbs. 1 1 0 lbs.
"DB" AIR CIRCUIT BREAKERS
a.
Observe whether all parts are in proper
alignment and move freely.
b.
Make certain that the studs have not been
forced out of alignment.
Be sure that the contacts are clean and
c.
properly aligned. For a description of contact align­
ment, refer to "Contacts", page 13.
3.
If the contacts are in alignment and all parts
move freely, continue the clockwise rotation until
the breaker is latched.
4.
Return the manual operating handle to the
neutral position, then rotate counterclockwise to
trip the breaker.
a.
The toggle linkage should collapse and the
moving contact assembly move freely to the full
open position. This should be followed immediate­
ly by complete resetting of the links in the toggle
mechanism as the handle is returned to the neutral
position.
b.
The links must always be free to
without friction or binding.
5.
Check the attachments for operation in accord­
ance with the appropriate instructions as given
under "Maintenance", Part Three of this book.
Note: It is not advisable to lubricate any
parts of the breaker. The lubrication supplied
during factory assembly is sufficient for years
of service. The lubricant is of a special form
which is used sparingly.
will only promote the accumulation of dust
and dirt.

STORING

If circuit breakers are not to
permanent location at once, they should be care­
fully inspected for loose or damaged parts and then
stored in a clean dry place in an upright position
to avoid damage to the circuit breaker parts.
covering of paper will prevent dust from settling on
the circuit breaker parts and is preferred to packing
or other materials that are apt to absorb moisture.
35-225-1
I.B.
. .
....
..
The addition of oil
be
installed in their
A
7